adj. showering with underage boys (like 10-12 year old boys) and touching their legs but in a supposed non-sexual way.
You know it's time to hit the showers at Penn State for some horseplay when the big hand touches the little hand.
A Midwestern urban regionalism means the same but includes a "get your back" connotation: grabass. No one considers that homoerotic.
2. I want no part of the moshing in the elevator horseplay!